How to Grow Feverfew
Tanacetum parthenium from Seed
The cottage garden's hardest-working white daisy — clouds of small white flowers with yellow button centres on aromatic ferny foliage; a hoverfly magnet that controls aphids throughout the garden, a 10–14 day cut flower filler that lifts every arrangement it joins, a medicinal herb with centuries of use, and a prolific self-seeder that renews its colony free of charge year after year
Feverfew (Tanacetum parthenium) is one of the hardest-working plants a cottage garden can contain — not because of any single dramatic quality, but because of the combination of qualities it provides simultaneously. It is a profuse cut flower filler with a 10–14 day vase life. It is a medicinal herb with centuries of documented use. It is a hoverfly magnet of exceptional potency, attracting the beneficial predatory insects that naturally control aphids throughout the surrounding garden. And it self-seeds so freely that once established, it largely renews itself year after year without further intervention. The small white daisies — hundreds on each well-grown plant, each with a prominent yellow button centre — are unassuming individually but extraordinary in mass: a cloud of white at 45–60cm that provides the same floating, airy quality in a border as Ammi majus but with aromatic, ferny foliage that adds its own textural contribution.
The variety sold as 'Feverfew' in cottage garden seed ranges is typically the single-flowered species form — small white daisy heads in loose corymbs, the yellow disc centre prominent. Technically a short-lived perennial (surviving 2–3 years in good drainage), it behaves in the garden more like a self-seeding annual: flowering in its first year from an early indoor sowing, then self-seeding freely to provide a perpetual renewing colony. The pinching habit at 15–20cm that creates the bushy, multi-stemmed plant of maximum productivity is the one management step that converts a good feverfew plant into an exceptional one.
Quick Facts at a Glance
Plant Type
Short-lived Perennial H4 — flowers year one from early sowing; self-seeds freely
Flowers
Small white daisies with yellow button centres; June–October
Height
45–60cm; bushy branching; pinch at 15–20cm for best form
Key quirk
Seeds need light to germinate — surface sow, no covering
Dual use
Cut flower filler (10–14 days vase life) + medicinal herb + hoverfly magnet
Difficulty
1 out of 5 — very easy from seed
Understanding the Plant
Tanacetum parthenium is a member of the daisy family (Asteraceae) native to the Balkans and the Caucasus, naturalised across much of Europe. Its common name derives from the Latin febrifugia — "to drive out fever" — reflecting its documented medicinal use going back to ancient Greece and Rome. The aromatic quality of the foliage (pungent, slightly bitter, distinctly herbal) comes from volatile compounds including parthenolide and camphor, which give the leaves their characteristic smell and are responsible for the plant's pharmaceutical properties.
The Pinching Habit — One Action, Three Times the Flowers
When feverfew plants are 15–20cm tall, pinching out the central growing tip — simply removing the top 2–3cm of the main stem between finger and thumb — redirects the plant's growth energy from a single upward stem into multiple lateral branches. Each of those lateral branches then produces its own flower-bearing stems. A well-timed pinch at 15–20cm converts a single-stemmed plant with one main corymb of flowers into a multi-branched, bushy plant that produces many times more cutting stems and extends the flowering season by several weeks. This is the single most productive management action available in the entire season's growing.
Feverfew as a Medicinal Herb
The primary medicinal use of feverfew is as a preventative treatment for migraines — a use that has been documented since the 1970s and has reasonable supporting clinical evidence (though not definitive proof). The active constituent parthenolide inhibits prostaglandin synthesis and serotonin release, both of which are implicated in migraine mechanisms. Traditional use involves chewing 2–3 fresh leaves daily as a preventative. Note: chewing raw feverfew leaves can cause mouth ulcers in some people; capsule or tea preparations avoid this. Feverfew should not be consumed during pregnancy — it has uterine-stimulant properties. The garden plant provides aesthetic, cutting, and wildlife value irrespective of medicinal use.
Sowing & Growing On
Surface Sow — Seeds Need Light, Not Darkness
Feverfew seeds are small and require light to germinate. Surface sow onto fine moist compost and cover with only the thinnest possible dusting of vermiculite — just enough to maintain moisture contact without blocking light. Keep the tray in a bright position at 15–20°C. Germination in 10–14 days. Direct sowing into prepared soil from March onwards is also highly reliable once the soil has warmed.
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Surface sow indoors February–April at 15–20°C; or direct sow outdoors from March. Fine dusting of vermiculite only — seeds need light. Germination 10–14 days. Seedlings are small; handle carefully at pricking out, holding by a seed leaf rather than the stem. Grow on at 15°C in bright conditions.
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Pot on into individual 9cm pots when seedlings have 3–4 true leaves. Feverfew grows quickly in warmth and good light — pot on before the plants become pot-bound. Harden off over 7–10 days before planting out after frost risk has passed.
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Pinch out the central growing tip when plants reach 15–20cm. This is the most important cultural step for maximum flower production. Remove the top 2–3cm of the main growing stem. The plant branches vigorously within 7–10 days, creating the multi-stemmed bushy form that produces the clouds of white daisies feverfew is known for in the cutting garden.
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Plant out after frost in sun or partial shade, 30cm apart. Feverfew is adaptable in its positional requirements — full sun produces the most floriferous plants; partial shade is well-tolerated and produces slightly longer, more cutting-garden-useful stems. Well-drained soil prevents root rot, which is the main vulnerability in a plant that can otherwise survive considerable neglect.
Growing On & Care
Hoverfly Haven
The open, accessible disc flowers of feverfew are among the most attractive available to hoverflies — those bee-mimicking flies whose larvae are voracious aphid predators. A well-grown feverfew plant in full flower is almost continuously visited by hoverflies on warm summer days. Their presence near other plants in the garden — particularly vegetables and other flowering plants prone to aphids — provides natural biological pest control. Growing feverfew specifically to attract hoverflies to a kitchen garden or cutting garden is a well-established organic practice.
As a Cut Flower
Feverfew is the archetypal "filler" — not a statement flower but a plant that makes other flowers look better. Its sprays of small white daisies provide a white, airy, textured accompaniment that lightens and lifts arrangements dominated by bold statement flowers. Vase life is an excellent 10–14 days. Cut when the majority of flowers on a spray are open. Strip all leaves that would sit below the waterline — feverfew foliage fouls water quickly due to its aromatic volatile compounds. The scent is strong and not universally loved; mix with sweetly-scented flowers like sweet peas to balance it.
Deadheading for Second Flush
After the main flush of flowers in June–July, cut back spent flowering stems to a leaf or bud lower on the stem. This removes the exhausted flowering material and stimulates the plant to produce a second flush of new growth and flowers from August through October. Without deadheading, plants typically slow or stop flowering after the first flush and begin to look untidy. With consistent deadheading, a single well-grown plant can produce cutting material for six months or more.
Self-Seeding and Long-Term Management
Feverfew self-seeds freely once established — more freely than almost any other cottage garden plant. Allow some stems to flower and set seed in an area of the garden where self-seeding is welcome, and new plants will appear the following spring without any further intervention. Once you have feverfew, you rarely need to buy more seed. If self-seeding is unwanted in a particular area, deadhead consistently before seed sets. Self-sown seedlings are easy to identify (ferny, aromatic foliage) and straightforward to transplant while small.
Harvesting for Medicinal Use
Harvest leaves when the plant is in bud or in early flower — this is when the concentration of parthenolide is highest. Use fresh, or dry by hanging small bunches in a warm, dark, well-ventilated location. Store dried material in an airtight container away from light. For tea: steep 1–2 teaspoons of dried leaves in boiling water for 5 minutes. For fresh leaf use: 2–3 fresh leaves daily (in a sandwich or with honey to mask the bitterness). Avoid in pregnancy and if taking blood-thinning medications.
Arrangement Pairings
Feverfew functions as a "neutral blender" in arrangements — the white daisy heads provide the same softening, lightening effect as baby's breath but with more visual substance and far better vase life. It works particularly well with: Dahlia Pompone Mixed (the small pompom heads float in a cloud of feverfew white); Cosmos (the large simple pink faces need the smaller white daisies to avoid looking isolated); and Sweet Peas (white feverfew and sweet pea fragrance together is the quintessential English summer vase).
Sowing & Flowering Calendar
| Jan | Feb | Mar | Apr | May | Jun | Jul | Aug | Sep | Oct | Nov | Dec | |
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| 🌱 Sow indoors |
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| 🌿 Plant out |
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| 🌼 Flowers |
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Common Problems & Solutions
| Problem | Likely Cause | What to Do |
|---|---|---|
| Poor germination | Seeds covered; no light | Feverfew seeds require light — burying them even shallowly significantly reduces germination. Surface sow and press gently without covering, keeping the tray in a bright position. Germination is typically reliable at 15–20°C in 10–14 days when the light requirement is met. |
| Leggy, single-stemmed plants | Pinching skipped; too much shade | Pinch out the central growing tip at 15–20cm height — this is essential for a bushy, productive plant. A single-stemmed unpinched plant produces a fraction of the flowers of a properly pinched plant. If the pinch was missed and the plant is already flowering, cut back by one-third — the plant will branch from lower nodes. |
| Flowers fading quickly in vase | Foliage in water; stems not conditioned | Strip all leaves from the lower portion of stems — feverfew foliage fouls water very rapidly due to its aromatic compounds, dramatically shortening vase life. Re-cut stems at an angle and place in clean, deep water immediately after cutting. Change vase water every 2 days. With correct preparation, vase life of 10–14 days is achievable. |
| Aphids on young growth | Spring aphid pressure | Feverfew is somewhat prone to aphid attack on young, soft growth in spring and early summer. The hoverflies the plant itself attracts will help control the population naturally as the season progresses. If intervention is needed, a strong spray of water or an organic insecticidal soap spray will reduce numbers. Avoid systemic insecticides which would harm the beneficial hoverflies. |
Plant Specifications
The cloud of white daisies that makes every other flower look better — and keeps the hoverflies busy all summer
Surface sow in light from February. Pinch at 15–20cm for three times the flowers. Plant in sun or shade after frost. Strip foliage below the waterline for 10–14 day vase life. Deadhead after the first flush for a second wave from August. Let some seed ripen. Never buy seed again.
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